US3592176A - Liquid fuel pumping apparatus - Google Patents
Liquid fuel pumping apparatus Download PDFInfo
- Publication number
- US3592176A US3592176A US833606A US3592176DA US3592176A US 3592176 A US3592176 A US 3592176A US 833606 A US833606 A US 833606A US 3592176D A US3592176D A US 3592176DA US 3592176 A US3592176 A US 3592176A
- Authority
- US
- United States
- Prior art keywords
- fuel
- outlet
- injection
- cylinder
- port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/46—Valves
- F02M59/462—Delivery valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
- F02M41/08—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined
- F02M41/14—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined rotary distributor supporting pump pistons
- F02M41/1405—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined rotary distributor supporting pump pistons pistons being disposed radially with respect to rotation axis
Definitions
- This invention relates to liquid fuel injection pumping apparatus for supplying fuel under pressure to a multicylinder internal combustion engine and of the kind comprising an injection pump and a distributor which distributes fuel delivered under pressure from the injection pump during successive injection strokes thereof, to a plurality of outlet ports in turn, the outlet ports in use, being connected by pipe lines rcspectively to the injection nozzles of the engine.
- Such pumps are provided with a form of control whereby the quantity of fuel which flows into the injection pump during successive filling strokes is substantially constant for a given setting of the control.
- the quantity of fuel delivered by the injection pump during each injection stroke should therefore be constant.
- differences in the quantity of fuel delivered are observed and these differences are thought to be due to the formation of cavities in the column of fuel between the injection pump and an outlet or due to over pressurization of the column of fuel.
- the cavities of over pressurization of the fuel occur due to pressure waves in the aforesaid pipelines.
- the object of the invention is to provide such an apparatus in which the formation of cavities or the over pressurization of fuel is minimized.
- each outlet is provided with a control valve which comprises a valve element slidable axially within a cylinder, resilient means acting to urge the element towards one end of the cylinder, a port formed in the wall of said cylinder and which is uncovered to said one end of the cylinder during movement of the element against the action of the resilient loading, and passage means whereby the other end of the cylinder is connected to a substantially constant pressure which is lower than the pressure generated by the injection pump, the arrangement being such that at the start of injection of fuel the element is moved against the action of its resilient loading by the pressure of fuel generated by the injection pump to uncover the port and to permit fuel to flow to the en gine and at the end of injection of fuel the element remains in this position until the pressure of fuel has dropped to a predetermined value, the element then returning towards said one end of the cylinder thereby closing said port to maintain said predetermined pressure in the pipeline and also serving during its return motion to maintain the fuel remaining in the distributor and injection pump at the pressure until the outlet is closed.
- a body part in which is mounted a rotary cylindrical distributor member 11 which at one end is coupled to an injection pump 12.
- This is provided with a transversely extending bore and mounted within this bore is a pair of reciprocable pumping plungers which are arranged to be moved inwardly as the distributor member rotates, by the action of cam lobes formed in the internal periphery of an annular cam ring which surrounds the dis tributor member at this point.
- the transversely extending bore is in communication with a longitudinal passage 13 extending within the distributor member and at one point this passage is in communication with a radially disposed delivery passage 14 which is arranged to register in turn and as the distributor member rotates, with a plurality of outlet ports 15 formed in the body part.
- the communication of the delivery passage 14 and one of the out let ports 15 occurs during an injection stroke of the injection pump and whilst the pumping plungers are being moved inwardly.
- Fuel is supplied to the injection pump 12 from a feed pump 16 having an inlet 17 and an outlet l8 formed in the body part and having its rotary part mounted on the distribu tor member.
- the outlet 18 of the feed pump is connected to an inlet port 19 formed in the body part 10 and which is positioned to register in turn with a plurality of inlet passages 20 formed in the distributor member and communicating at their inner ends with the longitudinal passage 13.
- the registration of an inlet passage with the inlet port occurs during a filling stroke of the injection pump and when the pumping plungers are allowed to move outwardly and the extent of outward movement is determined by a fuel control means 21 disposed intermediate the outlet of the feed pump and the aforesaid inlet port.
- the distributor member is driven in timed relationship with the cnginc with which the apparatus is associated and the outlet ports are connected by pipelines 22 respectively to the injection nozzles 23 of the engine to which fuel is being supplied by the apparatus.
- Each nozzle incorporates a spring loaded valve to control the flow of fuel through the orifice of the nozzle and the arrangement is such that during inward movement of the plungers fuel under pressure will be supplied to one of the nozzles thereby opening the valve therein and allowing fuel to flow to the associated combustion space.
- the delivery passage 14 moves out of register with the outlet port 15 and an inlet passage 20 is moved into registry with the inlet port l9. Fuel then flows into the injection pump, the quantity of fuel being determined by the setting of the control means. Thereafter the cycle is re peated and fuel is supplied to the outlet ports in turn.
- a control valve 24 the effect of which is to maintain the fuel con tained within the longitudinal passage and the delivery passage under pressure until the delivery passage has moved out of registration with the outlet. Furthermore, the control valve acts to maintain a predetermined residual pressure in the associated pipeline,
- the control valve comprises a cylinder 25 which is formed in the body part and in which is mounted a cylindrical valve element 26. One end of the cylinder is in communication with the outlet port 15 and formed in the wall of the cylinder is a circumferential groove 27 which constitutes a further port, and which communicates with the pipeline 22 and through which fuel flows to the injection nozzle.
- the valve element 26 is spring loaded towards said one end of the cylinder and the other end ofthe cylinder is in communication with a source of fuel at a substantially constant pressure which is lower than the pressure generated by the injection pump. Conveniently this source of pressure is the outlet 18 of the feed pump.
- this source of pressure is the outlet 18 of the feed pump.
- the pumping plungers are allowed to move outwardly by suitable shaping of the cam lobes but during this movement the delivery passage remains open to the outlet port.
- Fuel therefore flows from the pipeline 22 through the cylinder and into the passages of the rotor.
- the pressure of fuel falls to a predetermined value the element moves towards said one end of the cylinder and the groove is covered thereby preventing further flow of fuel from the pipeline.
- continued movement of the valve element occurs and during this movement fuel flows from said one end of the cylinder towards the transversely extending bore of the injection pump During this movement, however, the pressure of the column of fuel is maintained by the action of the valve element thereby minimizing the risk of the formation of cavities.
- the movement of the valve element under the influence of its spring loading is completed before the delivery passage moves out of register with the outlet port.
- a liquid fuel pumping apparatus for supplying fuel under pressure to a multicylinder internal combustion engine and of the kind comprising a body part, an injection pump in the body part, a plurality of outlet ports, formed in the body part and which in use, are connected by pipelines to the injection nozzles of the associated engine, a distributor in the body part and which distributes fuel delivered by the injection pump during successive injection strokes to the outlet parts in turn, a plurality of control valves for controlling the flow of fuel through the outlet ports respectively each control valve comprising a valve element slidable axially within a cylinder defined in the body part, resilient means acting to urge the element towards one end ofthe cylinder, passage means through which said one end of the cylinder is in communication with the associated outlet port.
- An apparatus as claimed in claim l including stop means to limit the extent of movement of the element against the action of the resilient loadings
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3126168 | 1968-07-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3592176A true US3592176A (en) | 1971-07-13 |
Family
ID=10320455
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US833606A Expired - Lifetime US3592176A (en) | 1968-07-01 | 1969-06-16 | Liquid fuel pumping apparatus |
Country Status (5)
Country | Link |
---|---|
US (1) | US3592176A (es) |
DE (1) | DE1933024B2 (es) |
ES (1) | ES369379A1 (es) |
FR (1) | FR2014459A1 (es) |
GB (1) | GB1266872A (es) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3943903A (en) * | 1973-07-14 | 1976-03-16 | C. A. V. Limited | Liquid fuel injection pumping apparatus |
US4082481A (en) * | 1976-02-24 | 1978-04-04 | Cav Limited | Fuel injection pumping apparatus |
US4100904A (en) * | 1973-09-28 | 1978-07-18 | Robert Bosch Gmbh | Fuel injection system |
US4393826A (en) * | 1980-12-23 | 1983-07-19 | Lucas Industries Limited | Liquid fuel injection pumping apparatus |
US20050031465A1 (en) * | 2003-08-07 | 2005-02-10 | Dreiman Nelik I. | Compact rotary compressor |
US20050201884A1 (en) * | 2004-03-09 | 2005-09-15 | Dreiman Nelik I. | Compact rotary compressor with carbon dioxide as working fluid |
US20060159570A1 (en) * | 2005-01-18 | 2006-07-20 | Manole Dan M | Rotary compressor having a discharge valve |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2318449A (en) * | 1942-09-18 | 1943-05-04 | Beeh Louis | Delivery valve |
US2853947A (en) * | 1953-03-16 | 1958-09-30 | Cav Ltd | Liquid fuel injection pumps for engines |
US3135209A (en) * | 1960-07-18 | 1964-06-02 | Nippon Denso Co | Fuel injection pump for internal combustion engines |
US3485225A (en) * | 1968-04-15 | 1969-12-23 | Caterpillar Tractor Co | Rotary distributor fuel pump |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB463898A (en) * | 1936-03-05 | 1937-04-08 | Bryce Ltd | Improvements relating to fuel injection pumps |
US2628570A (en) * | 1946-04-26 | 1953-02-17 | American Bosch Corp | Fuel injection device |
CH318971A (de) * | 1952-11-15 | 1957-01-31 | Maschf Augsburg Nuernberg Ag | Einrichtung zur Druckentlastung von Druckleitungen an Brennstoffeinspritzpumpen |
FR1358899A (fr) * | 1963-06-10 | 1964-04-17 | Cav Ltd | Pompe à combustible liquide pour moteur à combustion interne |
FR1524747A (fr) * | 1967-05-29 | 1968-05-10 | Cav Ltd | Appareil de pompage de combustible liquide pour moteur à combustion interne |
-
1968
- 1968-07-01 GB GB3126168A patent/GB1266872A/en not_active Expired
-
1969
- 1969-06-16 US US833606A patent/US3592176A/en not_active Expired - Lifetime
- 1969-06-25 FR FR6921281A patent/FR2014459A1/fr not_active Withdrawn
- 1969-06-28 DE DE19691933024 patent/DE1933024B2/de not_active Withdrawn
- 1969-07-01 ES ES369379A patent/ES369379A1/es not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2318449A (en) * | 1942-09-18 | 1943-05-04 | Beeh Louis | Delivery valve |
US2853947A (en) * | 1953-03-16 | 1958-09-30 | Cav Ltd | Liquid fuel injection pumps for engines |
US3135209A (en) * | 1960-07-18 | 1964-06-02 | Nippon Denso Co | Fuel injection pump for internal combustion engines |
US3485225A (en) * | 1968-04-15 | 1969-12-23 | Caterpillar Tractor Co | Rotary distributor fuel pump |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3943903A (en) * | 1973-07-14 | 1976-03-16 | C. A. V. Limited | Liquid fuel injection pumping apparatus |
US4100904A (en) * | 1973-09-28 | 1978-07-18 | Robert Bosch Gmbh | Fuel injection system |
US4082481A (en) * | 1976-02-24 | 1978-04-04 | Cav Limited | Fuel injection pumping apparatus |
US4393826A (en) * | 1980-12-23 | 1983-07-19 | Lucas Industries Limited | Liquid fuel injection pumping apparatus |
US20050031465A1 (en) * | 2003-08-07 | 2005-02-10 | Dreiman Nelik I. | Compact rotary compressor |
US20050201884A1 (en) * | 2004-03-09 | 2005-09-15 | Dreiman Nelik I. | Compact rotary compressor with carbon dioxide as working fluid |
US7217110B2 (en) | 2004-03-09 | 2007-05-15 | Tecumseh Products Company | Compact rotary compressor with carbon dioxide as working fluid |
US20060159570A1 (en) * | 2005-01-18 | 2006-07-20 | Manole Dan M | Rotary compressor having a discharge valve |
US7344367B2 (en) | 2005-01-18 | 2008-03-18 | Tecumseh Products Company | Rotary compressor having a discharge valve |
Also Published As
Publication number | Publication date |
---|---|
DE1933024B2 (de) | 1976-12-09 |
FR2014459A1 (es) | 1970-04-17 |
GB1266872A (es) | 1972-03-15 |
DE1933024A1 (de) | 1970-08-13 |
ES369379A1 (es) | 1971-06-01 |
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